EP 0484549 A4 19920708 - METHOD OF CONTROLLING MOLDING CYCLE OF INJECTION MOLDING MACHINE
Title (en)
METHOD OF CONTROLLING MOLDING CYCLE OF INJECTION MOLDING MACHINE
Publication
Application
Priority
- JP 9100637 W 19910515
- JP 13476390 A 19900524
Abstract (en)
[origin: WO9117879A1] This invention relates to a method of controlling the molding cycle of an injection molding machine provided with a flow passage opening/closing mechanism capable of interrupting the flow of injected plastic synthetic resin, and intends to reduce the length of time for one cycle of molding and to stabilize the value of weight of the product. The structure is such that said flow passage opening/closing mechanism is closed when plastic synthetic resin is filled into cavities of the metallic dies after injected and put in dwelling. This structure permits simultaneous progress of dwell process by residual dwell on the side of the metallic die and of weight measuring process for the subsequent molding cycle on the side of the screw, whereby the length of time for one cycle of molding can be reduced. With said flow passage opening/closing mechanism and a check valve provided for the screw, the pressure of plastic synthetic resin in the cylinder immediately before injection and during dwelling can be obtained as a definite value and, with the weight value of the product obtained from calculation, the injection molding machine can be controlled so that the weight of molded product may be kept constant.
IPC 1-7
IPC 8 full level
B29C 45/50 (2006.01); B29C 45/57 (2006.01); B29C 45/76 (2006.01); B29C 45/77 (2006.01)
CPC (source: EP KR US)
B29C 45/50 (2013.01 - EP US); B29C 45/57 (2013.01 - EP US); B29C 45/76 (2013.01 - EP US); B29C 45/77 (2013.01 - KR); B29C 2045/5096 (2013.01 - EP US)
Citation (search report)
- [X] EP 0325076 A1 19890726 - SEVA SOCIETE [FR]
- [Y] JP H0298421 A 19900410 - TOYO MACHINERY & METAL
- [E] WO 9113743 A1 19910919 - KOMATSU MFG CO LTD [JP]
- [E] EP 0464225 A1 19920108 - KOMATSU MFG CO LTD [JP]
- [E] WO 9113745 A1 19910919 - KOMATSU MFG CO LTD [JP]
- [X] PATENT ABSTRACTS OF JAPAN vol. 13, no. 194 (M-823)(3542) 10 May 1989 & JP-A-1 022 526 ( KOORITSU KIKAI K.K. ) 25 January 1989
- [Y] PATENT ABSTRACTS OF JAPAN vol. 12, no. 413 (P-780)(3260) 2 November 1988 & JP-A-63 150 632 ( SUMITOMO HEAVY IND LTD ) 23 June 1988
- See references of WO 9117879A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9117879 A1 19911128; DE 69104587 D1 19941117; DE 69104587 T2 19950309; EP 0484549 A1 19920513; EP 0484549 A4 19920708; EP 0484549 B1 19941012; JP H0428521 A 19920131; JP H0822562 B2 19960306; KR 100189347 B1 19990601; KR 920703303 A 19921217; US 5266247 A 19931130
DOCDB simple family (application)
JP 9100637 W 19910515; DE 69104587 T 19910515; EP 91909356 A 19910515; JP 13476390 A 19900524; KR 920700034 A 19920108; US 80955792 A 19920123